term (Deprecated)¶

Definition¶

term¶

The term operator specifies an unanalyzed search. The engine searches for the query terms exactly as they are indexed, with no analyzer modifications at query time. Any analyzer which was used during the index creation still applies to the index, but the search itself does not use an analyzer.

Note

The term operator normalizes the query terms in the same way they are normalized in the index. That is, when you use it with the Standard Analyzer, the operator converts your query terms to lower case. When you use it with the Keyword Analyzer, the term operator performs an exact match on the field.

term has the following syntax:

{
  $search: {
    "index": <index name>, // optional, defaults to "default"
    "term": {
      "query": "<search-term>",
      "path": "<field-to-search>",
      "wildcard": <boolean>,
      "regex": <boolean>,
      "prefix": <boolean>,
      "fuzzy": { "maxEdits": <integer>, "prefixLength": <integer> },
      "score": <options>
    }
  }
}

Field	Type	Description	Required?	Default
query	string or array of strings	The term or terms to search for.	yes
path	string or array of strings	The indexed field or fields to search. See path construction for more information.	yes
wildcard	boolean	Enable wildcard searching. Note The wildcard option is deprecated for the term operator. Use the wildcard operator instead.	no	false
regex	boolean	Enable regular expression searching. Note The regex option is deprecated for the term operator. Use the regex operator instead.	no	false
prefix	boolean	Use the string specified in query as a prefix and search for any term which starts with it. Note The prefix option is deprecated for the term operator. Use the wildcard or regex operators instead.	no	false
fuzzy	object	Enable fuzzy search. Find strings which are similar to the search term or terms.	no
fuzzy.maxEdits	integer	Maximum number of single-character edits required to match the specified search term. Note maxEdits has a maximum allowable value of 2.	no	2
fuzzy.prefixLength	integer	Number of characters at the beginning of the result that must exactly match the search term.	no	0
score	object	Modify the score assigned to matching search term results. Options are: boost: multiply the result score by the given number. constant: replace the result score with the given number.	no

Important

The wildcard, regex, prefix and fuzzy options cannot be used in combination with each other.

Examples¶

The examples on this page use a collection called fruit which contains the following documents:

1
{
2
  "_id" : 1,
3
  "type" : "apple",
4
  "description" : "Apples come in several varieties, including Fuji, Granny Smith, and Honeycrisp."
5
},
6
{
7
  "_id" : 2,
8
  "type" : "banana",
9
  "description" : "Bananas are usually sold in bunches of five or six."
10
}

The fruit collection has an Atlas Search index on the description field which uses the standard analyzer. The standard analyzer lower-cases all words and disregards common stop words ("the", "a", "and", etc).

1
db.fruit.aggregate([
2
  {
3
    $search: {
4
      "term": {
5
        "query": "several",
6
        "path": "description"
7
      }
8
    }
9
  }
10
])

1
db.fruit.aggregate([
2
  {
3
    $search: {
4
      "term": {
5
        "query": "Smith",
6
        "path": "description"
7
      }
8
    }
9
  }
10
])

1
db.fruit.aggregate([
2
  {
3
    $search: {
4
      "term": {
5
        "path": "description",
6
        "query": ["fuj", "bannas"],
7
        "fuzzy": { "maxEdits": 1, "prefixLength": 2 }
8
      }
9
    }
10
  },
11
  {
12
    $project: {
13
       "_id": 0,
14
       "description": 1
15
    }
16
  }
17
])

{
  "description" : "Bananas are usually sold in bunches of five or six."
},
{
  "description" : "Apples come in several varieties, including Fuji, Granny Smith, and Honeycrisp."
}